Turbocharger Boost Sensor B Circuit Low
The P0241 code indicates that the Engine Control Module (ECM) has detected a low voltage signal from the turbocharger boost sensor B circuit. This sensor monitors boost pressure and sends a voltage signal to the ECM. A low voltage reading suggests a short to ground, open circuit, or faulty sensor, which can lead to reduced engine performance and improper boost control.
01. Most Common Causes
- Faulty turbocharger boost sensor B
- Open or shorted wiring in the sensor circuit
- Poor electrical connection at the sensor or ECM
- ECM failure (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or limp mode
- Poor acceleration
- Excessive black smoke from exhaust
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the boost sensor B and its wiring for damage or corrosion.
Step 3: Test the sensor's voltage reference and ground with a multimeter.
Step 4: Compare sensor signal voltage to manufacturer specifications; replace if out of range.
Step 5: Check for continuity and shorts in the circuit between sensor and ECM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the vehicle may enter limp mode, reducing power and potentially causing further damage.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a sensor replacement, plus diagnostic fees if done by a shop.